Definition of technical terms in Chinese name: brake drum

English name: Brake Drum

Definition: "The inner cylinder is the friction working face

  Brake drum is a part of a drum brake system. When braking, the piston applies pressure to two pairs of half-moon brake shoes, pressing them against the inner wall of the tympanum, causing friction to stop the wheel from rotating

  The material of the brake drum is generally HT200-300 (gray cast iron). The matrix structure is mainly pearlite and A small amount of ferrite and cementite. The graphite is mainly grade A with long sheet shape and length class of 4-6, which plays the role of heat dissipation, increasing friction performance and reducing braking noise.

  The production process of brake drum blank is casting. The main raw materials required are pig iron, scrap steel and reboiler iron. At the same time, some alloys are added, such as Cu, Cr, etc., to improve the casting performance